import java.util.ArrayList;
import java.util.List;

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode() {}
 *     ListNode(int val) { this.val = val; }
 *     ListNode(int val, ListNode next) { this.val = val; this.next = next; }
 * }
 */
public class Text {
    public ListNode addTwoNumbers(ListNode l1, ListNode l2) {
        ListNode prev = new ListNode(0);

        int carry = 0;
        ListNode cur = prev;
        while(l1!=null||l2!=null){
            int x= l1 !=null ? l1.val : 0;
            int y = l2 !=null ? l2.val : 0;
            int sum = x + y + carry;
            carry = sum/10;
            sum = sum%10;
            cur.next = new ListNode(sum);
            cur = cur.next;

            if(l1 !=null){
                l1 = l1.next;
            }
            if(l2 !=null){
                l2 = l2.next;
            }
        }

        if(carry>0){
            cur.next = new ListNode(1);
        }
        return prev.next;
    }

    public static void main(String[] args) {
    }
}
